Here's the Canadian Government's "Complete list of U.S. products subject to counter tariffs"

https://www.canada.ca/en/department-finance/programs/international-trade-finance-policy/canadas-response-us-tariffs/complete-list-us-products-subject-to-counter-tariffs.html

Effective September 8, 2026

The new targeted counter tariffs are concentrated in sectors such as steel and aluminum, dairy, appliances, agricultural equipment, pulp and paper, plastics, and electronics. In certain sectors, such as steel and aluminum, existing counter-tariffs will increase from 25 per cent to 50 per cent to match U.S. rates.

Other existing counter-tariffs, including against U.S. autos, will also continue to apply.